Sleep Master iCoil 10 Inch Pillow Top Spring Mattress and BiFold Box Spring Set,&nbsp;Twin Firm, customized support from layers of Pressure Relieving Comfort Foam and iCoil Pocketed Springs Smartly Shipped - Our patented technology allows our mattresses to be efficiently compressed, rolled and shipped in a box conveniently to your door The BiFold Box Spring is designed to look like a traditional box spring with heavy gauge steel frame and fabric cover Folding mattress foundation compresses for easy mobility and storage Mattress: Worry Free 10 year limited warranty BiFold: Worry Free 5 year limited warranty